Convert AAC to FLAC Online
While converting lossy AAC to lossless FLAC does not improve quality, it creates a universally compatible archive format for your audio collection.
FLAC is supported by more dedicated audio players and devices than AAC, making this conversion useful for audiophile hardware.
What is AAC?
AAC (Advanced Audio Coding) is a lossy audio format used by Apple Music, iTunes, and YouTube. It offers excellent quality at small file sizes.
While AAC has great quality, it has limited support on some dedicated audio players and Linux systems compared to FLAC.
What is FLAC?
FLAC (Free Lossless Audio Codec) is a lossless format supported by most dedicated audio players, Android devices, and music servers.
FLAC is the preferred format for music servers like Plex and Jellyfin, and for dedicated audio players from Sony, FiiO, and Astell&Kern.
Why Convert AAC to FLAC?
将 AAC 转换为 FLAC 可在大多数用途中提升兼容性和质量。以下是主要原因。
Audiophile Hardware
Dedicated audio players and DACs often prefer or require FLAC format for playback.
Music Servers
Media servers like Plex, Jellyfin, and Navidrome handle FLAC better than AAC.
Metadata Preservation
FLAC supports comprehensive metadata tags for organizing large music libraries.
Open Format
FLAC is an open standard with no licensing restrictions, unlike AAC.
How to Convert AAC to FLAC
要将 AAC 转换为 FLAC，请按照以下步骤操作。所有处理都在您的浏览器中完成，文件不会离开您的设备。
Upload AAC file
Select your AAC or M4A file using the upload button.
Select FLAC output
Choose FLAC as your output format.
Convert
Click convert and wait for completion.
Download FLAC
Save your FLAC file for use with your preferred audio system.
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Convert AAC to FLAC NowPro Tips
Quality stays the same
Converting lossy AAC to lossless FLAC does not add quality - the audio data already lost in AAC compression cannot be recovered.
Use for compatibility
Convert to FLAC specifically when your hardware or software requires it.
Check hardware support
Verify your device supports FLAC before converting your entire library.
参考资料
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Our converter handles all AAC files automatically with no quality loss.
Files are processed securely and deleted after 1 hour for your privacy.
Convert AAC to FLAC Now常见问题
Does AAC to FLAC improve audio quality?
No. Converting lossy AAC to lossless FLAC preserves the existing quality but cannot restore audio data already discarded by AAC compression.
Why convert AAC to FLAC?
For compatibility with dedicated audio players, music servers, or software that requires FLAC format.
Will the FLAC be larger than AAC?
Yes, significantly. FLAC files will be 5-10x larger than equivalent AAC files.
Is this a good use case for conversion?
Only if your specific hardware or software requires FLAC. Otherwise, keeping AAC is more efficient.
Can I play FLAC on iPhone?
Yes, iOS 11 and later support FLAC playback natively in the Files app and third-party players.